This past weekend I was in Santa Fe shooting the aspen trees changing color. Under the tree canopies it's kind of shady but the sky is bright and very blue. The trouble I was having was trying to keep from blowing out the sky but not making the trees too dark... Any ideas or tips for balancing out such extreme lighting? I was using a Nikon D300s and 18-200 VR lens, on a tripod... Thanks!